set title "Block size and performance"
set ylabel "Time (ms)"
set xlabel "Input Size"
plot "m1block32.txt" with linespoints title "32", \
"m1block64.txt" with linespoints title "64", \
"m1block128.txt" with linespoints title "128", \
"m1block256.txt" with linespoints title "256", \
"m1block512.txt" with linespoints title "512"
